• Species: Bactrospora dryina (Ach.) A. Massal.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Baeomyces carneus Flörke
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kahvatu seensamblik

• Species: Baeomyces placophyllus Ach.
• Remark: excluded as misidentification: re-identified as Baeomyces rufus
• Fungus type: lichenized
• Treatment in Estonia: misidentification

• Species: Baeomyces rufus (Huds.) Rebent.
• Remark: includes earlier misidentification of Baeomyces placophyllus Ach.
• Fungus type: lichenized
• Treatment in Estonia: certain
• pruun seensamblik

• Species: Bagliettoa steineri (Kušan) Vězda
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bellemerea alpina (Sommerf.) Clauzade & Cl. Roux
• Remark: excluded as misidentification: re-identified as Aspicilia cinerea and Lobothallia radiosa
• Fungus type: lichenized
• Treatment in Estonia: misidentification

• Species: Bellemerea cinereorufescens (Ach.) Clauzade & Cl. Roux
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct

• Species: Biatora chrysantha (Zahlb.) Printzen
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora efflorescens (Hedl.) Räsänen
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora globulosa (Flörke) Fr.
• Remark: earlier under Lecania hyalina (Fr.) R. Sant. and Bacidia globulosa (Flörke) Hafellner & V. Wirth
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora helvola Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora ocelliformis (Nyl.) Arnold
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora sphaeroidiza (Vain.) Printzen & Holien
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatora vernalis (L.) Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatoridium delitescens (Arnold) Hafellner
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Biatoridium monasteriense J. Lahm ex Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• rohe-tilksamblik

• Species: Biatoropsis usnearum Räsänen
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Bilimbia lobulata (Sommerf.) Hafellner & Coppins
• Remark: earlier under Mycobilimbia lobulata (Sommerf.) Hafellner
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bilimbia microcarpa (Th. Fr.) Th. Fr.
• Remark: earlier under Mycobilimbia microcarpa (Th. Fr.) Lettau
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bilimbia sabuletorum (Schreb.) Arnold
• Remark: earlier under Bacidia sabuletorum (Schreb.) Lettau and Mycobilimbia sabuletorum (Schreb.) Hafellner
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bispora christiansenii D. Hawksw.
• Remark: see: Intralichen christiansenii
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Bispora lichenum Diederich
• Remark: see: Intralichen lichenum
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Bryoria bicolor (Ehrh.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct
• kahevärviline narmassamblik

• Species: Bryoria capillaris (Ach.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• peen narmassamblik

• Species: Bryoria chalybeiformis (L.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• pundar-narmassamblik

• Species:
• Remark:
• Fungus type:
• Treatment in Estonia: